Metal stair construction



Jan- 18, 1938. G, s. voN scHANTz 2,105,555

METAL STAIR CONSTRUCTION Filed Deo. '7, 193D' wif mf/ ,j

Patented Jan. 18, 1938 UNITED stares PATENT OFFIE 7 Claims.

This invention relates to metallic stair construction and has for an object to simplify and cheapen the construction, reducing the number and dilculties of operations required, particui larly in the assembly of parts on the poband particularly to avoid the use of securing bolts and nuts, or rivets, of which a large number are necessary in the usual prior constructions.

A further object is to provide a construction which presents a neat and pleasing appearance, making it unnecessary to apply a covering to the under face of the stairs to conceal unsightly parts.

A further object is to provide an improved u newel post construction and attachment to the stringers.

For a more complete understanding of this invention, reference may be made to the accompanying drawing in which 20 Figure 1 is a fragmentary side elevation of a stairconstruction embodying this invention, certain parts being sho-wn in dotted lines.

Figures 2 and 3 are detail sections on lines 2-2 and 3 3, respectively, of Figure 1. l

25 Figure 4 is a detail section on line 4-4 of Figure 3.

Figure is a side elevation of a Stringer showing newel post portions secured thereto.

Figure 6 is a fragmentary vertical section to a 30 larger scale through the assembled newel posts.

Figure Y'7 is a detail section lon line T-'l of Figure 4. f

Figure 8 is a View in part somewhat similar to Figure 7, but showing a modified construction.

35 Figure 9 is a fragmentary perspective showing a corner newel post. 4 Referring to the drawing, at l is indicated a metallic Stringer shown as a channel member. To the inner or iiat face of this channel member, 40 whichis inclined to the horizontal, is secured a flat strip 2 which is bent into zigzag form, one edge of the strip being secured to the inner face of the channel Stringer as by a weld as at 3 (see Figures 2, 3 and 7). The opposite Stringer 45 l(not shown) has likewise secured to its inner face opposed to the strip 2 a similar zigzag strip, this strip also being welded in the same manner to the inner face of the Stringer. The member 2 forms a support for the tread plates 5, which 50 are sufficiently shorter than the space between the channel stringers l to clear the welds 3 at each end. As shown in Figures 3 and 7, the strip 2 may have tongues 6 partly cut therefrom and pressed upwardly in the tread supporting por- 5 tions thereof, and the tread plates 5 may have openings 'l (see Figures 2 and 7) through which the tongues 6 may pass, after which these tongues are bent over, preferably toward the stringers I, as shown best at 8 in Figure 7, so as to secure the tread plates in position. Where it is not desired 5 that openings should show on the lower surface of the stairathe securing tongues may be formed as portions of angle pieces l0, one ange H of each` o f which being secured as by wedding to a strip 2, the tread plates being 'provided with 10 openings such as l2 (see Figure 8) of sufficient size to receive the angles i0, whereupon the upstanding leg I3 of each of theseangles may be bent down against the top face of the tread plate as shown in full lines.

Referring more particularly to Figure 4, a riser shown at ZD'maybear against the forward face of each of the zigzag strips 2. This riser plate isrshown as formed at its upper end with a nosing Zini-generally channel cross section. Each of the tread plates 5 is formed with an upstanding flange 22, which, when the tread plate is in position, abuts against the inner face of the nosing within the channel, and securing pieces 23 welded at their upperends to the inside face of the nos- 25 ing may, after the parts are in the position shown in Figure '4, be bent down at their lower ends 2li into the full line positionto clamp each ange 22 tofanosing.v 4 The nosing 'defines with the tread plates and the inner faces of the stringers depressions to receive the tread composition, which may be of any suitable type, and which comes up to the level indicated by the dot and dash line a on Figures 1 and 4. This tread material lls in in front of the lower portion of each of the riser plates and holds it back against the strip 2, so thatin general it is unnecessary to secure the riser strips in position to the strip 2, although this may` be done additionally, if desired.

The newel post 30, as shown in Figures l and 5, is formedof separate upper and lower sections 3| and 32, respectively, the post being tubular and inthe form shown square, though any other desired cross section may be employed. As shown best in1Figure5, a lower newel post section 32 is securedas by welding to the upper edge of the Stringer l butting its lower flange and terminating below its upper flange, and an upper newel post section 3l is secured as by welding to the 50 lower end of this Stringer butting against the upper Stringer iiange and terminating short of the lower flange. When the parts are assembled, two stringers with their newel post portions, such as shown in Figure 5, are brought above the stringers to receive the hand rail (not shown).

As shown in Figure 6 each upper newel post section 3l has positioned therein and telescopically relatedv thereto a securing member 35. This member comprises a sleeve closely fitting within the upper section 3l and secured therein as by welding 31, filling one or more holes 38 through the walls of the upper section 3l. The member 35 is shown as having a base member 40 welded thereto as at 4|, and through this base member passes an extension piece 42 formed as a rod having its lower end threaded as at 43.

This extension 42 is thus of smaller diameter than the member 35 and it may have threaded engagement at its lower end with an ornamental base cap 45 for the lower end of the newel post. The threaded engagement between the extension 42 and this cap serves to secure the member 35 to the lower section, and as this member 35 laps the joint between the upper and lower sections, it holds them securely in axial alinement. vWhile in Figure l the upper and lower stringers are arranged in axial alinement, this newel post construction permits these stringers to be arranged in any other angular relationship desired, as shown, for example, in Figure 9 where the upper Stringer la is at right angles to the lower Stringer lb, thus being positioned in a different plane from the Stringer. The newel posts herein Shown are square, which permits the postsections to fit together in either alinement, or right angularly related to each other. It should, of course, be evident that by making the newel posts round in cross section, the upper and lower sections will fit together in any angular position desired, or by making the newel post sections polygonal with other than four sides,"various other special angular relationships may be provided for in accordance with the requirements of Aindividual installations.

From the foregoing description of certain embodiments of this invention, it should be evident to those skilled in the art that various changes and modications might be made without de- Y parting from the spirit or scope of this invention as dened by the appended claims.

I claim:

l. Stair construction comprising a pair of inclined Stringer members having their ends substantially vertical, a lower section of a newel post secured to the upper end of one of said stringers and terminating below its upper edge, an upper section of a newel post secured to the lower end of the other Stringer extending above said stringer and terminating above its lower edge, and means holding said sections in axial alinement.

2. Stair construction comprising a pair of inclined Stringer members having their ends substantially vertical, a lower section of a newel post secured to the upper end of one of said stringers and terminating below its upper edge, an upper section of a newel post secured to the lower end of the other Stringer extending above said Stringer and terminating above its lower edge, means holding said sections in butting axial alinement, and a plurality of Stair-supporting members carried by each Stringer.

3. Stair construction comprising a pair of inclined stringers composed of structural beams having their ends substantially vertical, a lower section of a newel post secured to the upper end of the lower of said stringers, a top section of a newel post secured to the lower end of the upper of said stringers, and means for Securing said newel post sections in alinement.

4. Stair construction comprising a pair of inclined stringers composed of structural beams having their ends substantially vertical, a lower section of a newel post secured to the upper end of the lower of said stringers and terminating below its upper edge,a top section of a newel post secured to the lower end of the upper of said stringers and terminating above its lower edge, and means for securing said newel post sections in butting alinement. l v

5. Stair construction comprising a pair of inclined stringers composed of structural beams having their ends substantially vertical, a lower section of a newel post secured to the upper end of the lower of said stringers and terminating below its upper edge, a top section of a newel post secured to the lower end of the upper of said stringers and terminating above its lower edge, and means for securing said newel post sections in butting alinement and with said beams arranged in different planes.

6. Stair construction comprising a pair of inclined channel beams having their ends substantially vertical, a lower section of a newel post secured to the upper end of one of said beams in butting relation to the lower flange of said beam and terminating below the upper flange thereof, an upper section of a newel post secured to the lower end of the other of said beams and butting the upper flange thereof and terminating at its lower end above the lower flange thereof, and means for securing said newel post sections in axial alinement.

7. Stair construction comprising a pairof inclined channel beams having their ends substantially vertical, a lower section of a newel post secured to the upper end of one of said beams in butting relation to the lower flange of said beam and vterminating below the upper flange thereof, an upper section of a newel post secured to the lower end of the other of said beams and butting the upper flange thereof and terminating at its lower end above the lower ilange thereof, means for securing said newel post sections in axial alinement, and stair tread supporting members Secured to the flat faces of said beams.

GUSTAF S. VON SCHANTZ. 

